From the runDisney website:
“YOU MUST PICK UP YOUR OWN PARTICIPANT PACKET (WHICH INCLUDES YOUR EVENT-ISSUED BIB NUMBER AND TIMING DEVICE) DURING REGULARLY SCHEDULED HOURS. Individuals will no longer be able to pick up participant packets on behalf of others.”
Previously runners could complete a waiver to allow someone else to pick up their packet and bib.
The new policy will discourage the re-sale of race bibs for runDisney events, which typically sell out quickly.